PLEASURE
DUTY |
- Highly intermittent operation with very large
variations in engine speed and power
|
Average engine
operating
hours limit: |
500 hours/year
(for HBW transmissions, 300 hours/year). |
Typical hull
forms: |
Planing. |
Typical
applications: |
Private, non-commercial,
non-charter sport/leisure activities. |
|
LIGHT
DUTY |
- Intermittent operation with large variations
in engine speed and power
|
Average engine
operating
hours limit: |
2500 hours/year
(for HSW and IRM transmissions, 2000 hours/year). |
Typical hull
forms: |
Planing and
semi-displacement. |
Typical
applications: |
Private and charter,
sport/leisure activities, naval and police activities. |
|
MEDIUM
DUTY |
- Intermittent operation with some variations in
engine speed and power
|
Average engine
operating
hours limit: |
3500 hours/year. |
Typical hull
forms: |
Semi-displacement and
displacement |
Typical
applications: |
Charter and commercial
craft (example: crew boats), and naval and police
activities. |
|
CONTINUOUS
DUTY |
- Continuous operation with little or no
variations in engine speed and power
|
Average engine
operating
hours limit: |
Unlimited |
Typical hull
forms: |
Displacement. |
Typical
applications: |
Heavy duty commercial
vessels, tugs, fishing boats. |
|